GRB 120811A
Host Galaxy:
Other Observatory Detections:
Time: 02:35:18
Trigger Number: 530581
Burst Advocate: Binbin Zhang
Burst Alert Telescope (BAT):
| RA (J2000) |
Dec (J2000) |
90% Error a Radius |
T90 b | Fluence c (15-150 keV) |
1-sec Peak d Photon Flux (15-150 keV) |
Photon Index e (15-150 keV) |
|---|---|---|---|---|---|---|
| 257.184 17:08:44.2 |
-22.735 -22:44:06.0 |
2.6 | 166 | 11 (1) | 1.0 (0.1) | 1.95, PL (0.20) |
90% error in parentheses,
a arcmin; b seconds; c 10-7 erg/cm2; d ph/cm2/sec; e PL = simple power-law, CPL = cutoff power-law
X-Ray Telescope (XRT):
| RA (J2000) |
Dec (J2000) |
90% Error a Radius |
Time to First b Observation |
Early Flux c (0.3-10 keV) |
11 Hour Flux c (0.3-10 keV) |
24 Hour Flux c (0.3-10 keV) |
Initial d LC Index |
Spectral Index (Gamma) |
Column e Density (NH) |
|---|---|---|---|---|---|---|---|---|---|
| 17:08:39.70 | -22:42:38.0 | 2.8 | n/a | n/a | 0.08926366 | 0.052599426 | -0.6779 | 1.99897 | 8.66874 |
a arcsec; b seconds; c 10-11 erg/cm2/s; d temporal; e 1021 cm-2
Note: Please be aware that only the very basic temporal and spectral quantities are reported here. You are strongly encouraged to see the referenced GCN circulars for full details.
UltraViolet/Optical Telescope (UVOT):
| RA (J2000) |
Dec (J2000) |
90% Error a Radius |
Time to First b Observation |
Magnitude | Other Filter Magnitudes |
|---|---|---|---|---|---|
| n/a | n/a | n/a | 5627 | V>19.1 | B>20.2 U>20.0 UVW1>19.9 UVW2>19.8 White>20.7 |
a arcsec; b seconds
Comments:
While the BAT lightcurve and spectral results are consistant with a GRB origin for this trigger, given that the galactic coordinates are (lon,lat)=(0.6,10.3) deg, we cannot rule out a galactic source origin.
XRT: The fact that the XRT source is fading suggests that Swift trigger 530581 is most likely a GRB.
UVOT: no detection
References:
BAT: GCN 13618; GCN 13633
XRT: GCN 13641; Evans et al., 2009, MNRAS, 397, 1177
UVOT: GCN 13641
Radio:
Redshift:
Host:
Other: GCN Report 413.1
BAT Light Curve:
